Wailuku residents are asked to conserve water beginning tonight while the Wai'ale tank is taken out of service temporarily for an improvement project.

Conservation is requested from 9 p.m. today to 8 a.m. Monday. The county Department of Water Supply said affected areas include Wailuku Heights, Waikapu, Kehalani (mauka of Honoapi'ilani Highway), Maui Tropical Plantation, Kahili Golf Course and King Kamehameha Golf Course.

Customers are asked to turn off irrigation systems and other nonessential uses of water. The water supply department said that would help it preserve water levels in the storage tanks for health and safety purposes.

During this time, the 3 million-gallon Wai'ale Tank off of Wai'ale Road will be out of service because of work to connect the new Maui Lani Wells to the county system. The wells are expected to be online by April.

The tank shutdown may cause low water pressure in Kahului tomorrow. This includes the area around Lihikai School between Onehe'e Avenue, Pälama Drive, South Wakea Avenue and Ka'ahumanu Avenue. The Maui Lani subdivision, Lihikai and Pomaikai elementary schools, and Maui Waena Intermediate School will also experience very low water pressure.

Customers can call the 24-hour service line, 270-7633, if a water problem occurs.